Finding the Fourth Proportional to 128,003.07, 191,896.16 and 53,076.45

Step by Step Solution

1. Step 1: Write the proportion equation
   128,003.07 : 191,896.16 = 53,076.45 : x
2. Step 2: Convert to fraction form
   128,003.07/191,896.16 = 53,076.45/x
3. Step 3: Cross multiply
   128,003.07x = 191,896.16 × 53,076.45
4. Step 4: Simplify right side
   128,003.07x = 10,185,166,676.05
5. Step 5: Solve for x
   x = 10,185,166,676.05/128,003.07
6. Step 6: Final answer
   x = 79,569.71